Experimental and numerical investigations of heat transfer and flow characteristics of cross-cut heat sinks
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Author list: Chingulpitak S., Chimres N., Nilpueng K., Wongwises S.
Publisher: Elsevier
Publication year: 2016
Journal: International Journal of Heat and Mass Transfer (0017-9310)
Volume number: 102
Start page: 142
End page: 153
Number of pages: 12
ISSN: 0017-9310
eISSN: 1879-2189
Languages: English-Great Britain (EN-GB)
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Abstract
This study aims to experimentally and numerically investigate the heat transfer and flow characteristics of plate-fin and cross-cut heat sinks. The accuracy of the measured data is verified by comparing them with the exiting correlations. In the case of the cross-cut heat sink, the effects of cross-cut lengths (Lc) and number of cross-cuts (Nc) are presented. The experimental results show that the cross-cut heat sink with Lc = 1.5 mm gives the lowest thermal resistance. In the case of a numerical study, the numerical results are validated by comparing them with the measured data. The comparison results show that the present model gives reasonable agreement with the measured data. Consequently, the present model is used to find the optimal length and number of cross-cuts. From the numerical results, it is found that the thermal resistance of a cross-cut heat sink with Lc = 1.5 mm and Nc = 6 is 16.2% lower than that of a plate-fin heat sink at the same pumping power. ฉ 2016 Elsevier Ltd.
Keywords
Cross cut, Parallel flow, Plate fin
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